1. Warm Up
Which can you use to prove congruence: SSS, SAS, ASA, or AAS?

2. Announcements HW and Warm Ups Due Friday Test Monday
Extra Credit Quiz Tuesday

3. Isosceles Triangle Theorem
If two sides of a triangle are congruent, then the angles opposite those sides are congruent.

4. Converse of Isosceles Triangles TH
If two angles of a triangle are congruent, then the sides opposite those angles are congruent

5. Example

6. Theorem 4-5
If a line bisects the vertex angle of an isosceles triangle, then the line is also the perpendicular bisector of the base.

7. Equilateral Triangles
If a triangle is equilateral(sides =), then the triangle is equiangular(angles =).
If a triangle is equiangular, then the triangle is equilateral.

8. Example
What is the measure of angle A? A C B

9. Congruent Triangles WS Pg. 184-186 #5-20, 29, 30 Pg. 166 #1-9
Homework
Pg #1, 4-7, 9-11
Congruent Triangles WS
Pg #5-20, 29, 30
Pg. 166 #1-9
Triangle Proofs WS
Pg. 172 #1-4, 6-8, 11-14